A2000 non-booting prob...

[keropi]

no noone around here that I know was an amiga... I will try tomorrow the extra chips I have but I don't think I have a chance...
also the goldengate486 inside does not work ok, I don't know what the hell is wrong with it.
I am disapointed, I don't know if I will repair it... maybe I sell the parts to some Greek guys...

[viddi]

Don´t give up! Good luck.


Smile

[cv643d]

You need a special adapter for the GoldenGate for it to work with the A2000. You place the adapter on the 68k sockle IIRC.

I had some troubles with my A2000 once, I made a scratch to the mobo and cut it deep so I cut a trace under the 68k CPU. But I managed to fix it with a way to big solder iron.

You problem can be anything really, get another A2000 and rip out the mobo, they are not exactly collectors items or rare

[keropi]

@cv643D

I think this "adapter" (it is only a capacitor lol) is needed only when u use the onboard 68000... I have a 2630 cpu-card, and the amiga was working like that for years (for the previous owner atleast from what he said....)
plus I already tried it on my A4000D (removed my existing gg486 and plugged this one... no go)
I know they are not rare, but that was a sweet revision, because 6.2 has all for isa slots complete (and not 216bit and 2 8bit like all other revs...)

[AGN]

try to
pull mbo from case and boot in on desk
look for any scratches on board
run w/o fdd
if some tracks/wites looks strange, check them
check voltage on psu
if there any capacitors - check them twice
get a500 for spare parts or as test machine
a2k had battery?
test all sockets using buzzer/multimeter
clean mbo using ethanol
drink it

[keropi]

drinking thingie , bizzare!....

I am not going to check with multimeters and the likes, no way.... I will try my spare parts tomorrow and that's it... like _almost_ all life's probs, this can be solved with money... so I will get another mobo and if someone on EAB wants this one for postage I can send it...

[coze]

Originally Posted by AGN

try to

if there any capacitors - check them twice

how do you understand if a capacitor is faulty ?

[musashi5150]

Originally Posted by coze

how do you understand if a capacitor is faulty ?

If it was me I'd borrow the capacitance meter thing we have here at work. But there is probably another way for 'joe public'?

[keropi]

I just exchanged both cias and the gary... that is all the parts I have, and still no go...

[MrZammler]

Originally Posted by keropi

maybe I sell the parts to some Greek guys...

Good idea !

[keropi]

lol u Mr!

[Secret Vampire]

Originally Posted by coze

how do you understand if a capacitor is faulty ?

With dificulty... you can remove them to see if they're leaky using a suitable DC source and an ammeter, but if you're doing that on cheap small capacitors you may as well just replace them. additionally, and more useful for this kind of thing, you can test their ESR in circuit with an ESR tester, but, even bargain basement ones cost upwards of £60. If you have an oscilloscope you can bodge together an ESR test dongle out of a 555 timer and some other components http://octopus.freeyellow.com/99.html then interpret what you see on the scope display.
If you don't have a scope, there are plans to build an Amiga based software scope on Aminet in hard/hack, but obviously you get limited bandwidth (though, it should be able to manage 100KHz) and you need more than one Amiga since putting random signals into a running machine is likely to have interesting and unexpected results.